【Learn Ethylene Together】Five questions per day to easily learn about ethylene 21

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【Learn Ethylene Together】Five questions per day to easily learn about ethylene. 21 1. The ignition point of flammable liquids is generally higher than their flash point. (a) a. 1~5℃ b. 7~11℃ c. 20~27℃ 2. The temperature of a lit cigarette butt is . ( ) a. 400~500℃ b. 650~800℃ c. 700~750℃ 3. Generally, the closing pressure of a safety valve is of its opening pressure. （） a、60% b、80% c、90% 4、Pyrogen gas regeneration makes use of the principle of desiccants in . ( ) a. Releasing moisture under high temperature and low pressure b. Absorbing moisture under low temperature and high pressure c. Absorbing moisture under high temperature and high pressure 5. There are mainly two methods used in industry for separating pyrolysis gases. ( ) a. Cryogenic separation method and compression separation method b. Cryogenic separation method and oil absorption distillation separation method c. Distillation separation method and cryogenic separation method 1. The ignition point of flammable liquids is generally higher than their flash point. (a) a. 1–5°C b. 7–11°C c. 20–27°C 2. The temperature of a lit cigarette butt is . (b) a. 400~500℃ b. 650~800℃ c. 700~750℃ 3. Generally, the closing pressure of a safety valve is of its opening pressure. (b) a. 60% b. 80% c. 90% 4. Pyrogen gas regeneration utilizes the principle of desiccants in . (a) a. Releasing moisture at high temperature and low pressure; b. Absorbing moisture at low temperature and high pressure; c. Absorbing moisture at high temperature and high pressure. 5. There are mainly two methods used in industry for separating pyrolysis gases. (b) a. Cryogenic separation method and compression separation method b. Cryogenic separation method and oil absorption distillation separation method c. Distillation separation method and cryogenic separation method